Found a solution.
In the server-document I had spesified that 5 agents could run at the same time. This caused the server to allocate to much memory, so the agent truncated the column-header name in the result-set.
When number of agents was set to 4 insted, the agent worked as normal.
If you want mor details, feel free to send me an e-mail on
mailto:jtmarkus@frisurf.no.