Report server intermittent Terradata errors

Hi all,

I've build a few reports in visual studio, they work and they don't work, in a minute I can run them next minute I can't and I get this errors in event viewer every time they can't be run:

Report Server (MSSQLSERVER) cannot load the SQLPDW extension.

Report Server (MSSQLSERVER) cannot load the TERADATA extension.

Any idea qhat I need to do to avoid this?


Thanks in advance