Hi Marc,
The problem is that the xquery is so long that's it drops in time out, and in this case I don't have the QP.
Do you have any guess what takes most time? Is it really the transfer of the query string to the server, or is it the time for parsing and/or compiling the query? Do you use the default timeout of 30 seconds?
If you want, you can pass us on the query string, we can then have a look.
Cheers, Christian