I bought the command line version of PDF Stamp from you and discovered that it didn't run on my computer. I guessed it would work on Windows 7 since Vista is supported, but it didn't. I have made a test on a computer with Windows XP and it was successful. When will you upgrade to Windows 7 compatibility? I won't be able to do very much until then.
Our PDF Stamp Command Line does support Windows 7 system, please run PDF Stamp Command Line with administrator right to try again, we hoping administrator right will helpful to you.