The OS is English - WinXP SP2, so is IE7. Only changing the Regional and Language Options from Turkish to English (United States) worked for us. We didn't need to alter any IE settings. I want to call attention to the Turkish character 'ı' (i without the dot) in the error string.
"Test method TestDnm.WebAiiVSUnitTestSM1.TestMethod1 threw exception:
System.ArgumentException: Target '[Element: 'ınput:1' (name=q)]' is not
a support element to set text to.."
[WebAii assembly version: 1.1.900.0]