Sorry monks, my fault.

It took me 3 weeks to find out that the problem had to do with field-length. Line 124 was the closing of a recordset.

I use Win32::Loginname, which usually is my 8-character uid from the command-line, but run from a browser it is a 25-character IWAM-blablabla IIS uid. This uid will be written to a 8-char field in the database, so an error occurs during the execution of the INSERT statement which finally results in the error of the "Close".

Edited by Chady -- fixed formatting.