Problem when loading Schema in deployed Mock

Hi,

when I deploy my soapUI Pro Mock to a WebLogicServer, I get the following error-log-message:

14:36:14,394 DEBUG [AbstractWsdlDefinitionLoader] Returning baseInputSource [file:/C:/Temp/swep/WSDLGenerator/src-gen/KundenVerwaltung_v_2_0.wsdl]
14:36:14,445 ERROR [SoapUI] An error occurred [org.apache.xerces.jaxp.DocumentBuilderFactoryImpl], see error log for details
<24.11.2014 14:36 Uhr MEZ> <Error> <com.eviware.soapui.mockaswar.MockAsWarServlet> <BEA-000000> <null
java.lang.Exception: java.lang.ClassCastException: org.apache.xerces.jaxp.DocumentBuilderFactoryImpl
        at com.eviware.soapui.impl.support.definition.support.AbstractDefinitionContext.load(AbstractDefinitionContext.java:176)
        at com.eviware.soapui.impl.support.definition.support.AbstractDefinitionContext.load(AbstractDefinitionContext.java:119)
        at com.eviware.soapui.impl.support.definition.support.AbstractDefinitionContext.loadIfNecessary(AbstractDefinitionContext.java:95)
        at com.eviware.soapui.impl.wsdl.mock.WsdlMockRunner.<init>(WsdlMockRunner.java:65)
        at com.eviware.soapui.impl.support.AbstractMockService.start(AbstractMockService.java:261)
        at com.eviware.soapui.impl.support.AbstractMockService.start(AbstractMockService.java:231)
        at com.eviware.soapui.impl.support.AbstractMockService.start(AbstractMockService.java:46)
        at com.eviware.soapui.mockaswar.MockAsWarServlet.init(MockAsWarServlet.java:96)
        at javax.servlet.GenericServlet.init(GenericServlet.java:242)
        at weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run(StubSecurityHelper.java:283)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
        at weblogic.servlet.internal.StubSecurityHelper.createServlet(StubSecurityHelper.java:64)
        at weblogic.servlet.internal.StubLifecycleHelper.createOneInstance(StubLifecycleHelper.java:58)
        at weblogic.servlet.internal.StubLifecycleHelper.<init>(StubLifecycleHelper.java:48)
        at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:539)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:244)
        at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:27)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:61)
        at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:119)
        at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:324)
        at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:460)
        at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:103)
        at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:171)
        at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:61)
        at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:163)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:61)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3748)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3714)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
        at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2283)
        at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2182)
        at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1491)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)
Caused By: java.lang.ClassCastException: org.apache.xerces.jaxp.DocumentBuilderFactoryImpl
        at javax.xml.parsers.DocumentBuilderFactory.newInstance(DocumentBuilderFactory.java:123)
        at oracle.j2ee.ws.wsdl.xml.WSDLReaderImpl.getDocumentBuilder(WSDLReaderImpl.java:165)
        at oracle.j2ee.ws.wsdl.xml.WSDLReaderImpl.readWSDL(WSDLReaderImpl.java:346)
        at oracle.j2ee.ws.wsdl.xml.WSDLReaderImpl.readWSDL(WSDLReaderImpl.java:305)
        at oracle.j2ee.ws.wsdl.xml.WSDLReaderImpl.readWSDL(WSDLReaderImpl.java:289)
        at com.eviware.soapui.impl.wsdl.support.wsdl.WsdlInterfaceDefinition.load(WsdlInterfaceDefinition

I would expect the schema files to be loaded from the soapUI Project file (which is included in the generated war-archive).
But obviously there seems to be a problem.

Can you please give me a hand?

Best regards