This problem is on a Windows XP PC. I successfully have always used the Tools->Folder Options->File Types GUI to register the fact that Perl scripts use Perl.exe with %1 %* with the Open action. On a particular PC with administrator rights, this refused to work. The system would allow me to assign the association and did not give any error messages.However, when I left Folder Options etc and opened this again, the assignment was not there.Does anyone know what is going wrong and how to overcome this problem.