I used to work on Pentium 4 compute under Windows XP Professional with gcc-3.4.4. DLL files are builded sucessfully and able to simulate DLL properly. But now I am working on AMD Athlon under Windows XP Professional with gcc-3.4.4. On this PC I am unable to build DLL files. While running this DLL in simulator , simulator got hanged. I don't understand what made this difference. Please help in resoving this problem. thanks in advance Thanks & Regards, syam