Hi, In my project which is developed in PowerBuilder migrated from Windows XP to Windows 7. We are using MSCOMM32.OCX file in PowerBuilder OLE object to connect the application to COMM port. I am able to register the OCX file in Windows7 with out any error. This OCX file is not working in Windows 7 machine, i ran ListDlls.exe in windows 7 and MSCOMM32.OCX is the last file which executed as per listdlls report. Is there any dependency for MSCOMM32.OCX file in windows7? Please let me know. Thank you. Regards, SB

1. If you have 64bit W 7, copy ocx in C:\Windows\SysWOW64 folder and run the regsvr32.exe 2. Are there any error logs and warnings 3. Try to contact PB forum http://www.sybase.com/support/community-forums Regards Milos