LoadRunner Error in Windows Server 2003 SP2

Hi, I have some problems about LoadRunner 9.50 run in Win2003.

1. "Runtime Error! Program: C:\Program Files\HP\LoadRunner\bin\vugen.exe This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information." occurs for recording "Web(HTTP/HTML)" script. The error pops up after clicking "Recording Summary". But the script can still be generated successfully.

2. For recording "Web(Click and Script)", the number of events is increasing while recording. But after stopping it, there is no script generated. Only the first page opened is recorded.

I have tried to change "Data Execution Prevention" setting, but it does not help. Also, I have tested that these problems do not occur in Windows XP SP3.
Do my Win2003 env have error? or any other reason? Thanks.=]