Permissions issue pushing to remote repo using GIT

Hi,

 We are using GIT as our version control.   We we try to push to our remote repo from within Test Complete we get the error, "No supported authentication methods available"

 We can use Git Extensions and push to our remote repo just fine. 

 We are running pageant and have the appropriate SSH key loaded.

  I've added the environment variable GIT_SSH and it points to the appropriate version of plink.exe.

 Has anyone else run into this issue?

  Thanks,