Why does it work in TestComplete but not TestExecute

I have some code in Testcomplete that works fine on my machine. But when I deploy to any test machine

it sometimes works. Meaning. sometimes the code works, sometimes it does not. The code at hand is this:

browser = Sys.WaitBrowser("*",10000);

page = brower.FindChild("ObjectType", "Page", 1000);

It always works in TestComplete, but sometime it does not work when I deploy to TestExecute. I would

say that fails in TestExecute 75% of the time.

Thanks