DysplayTag exports blank excel's, xml's and pdf

Hi!

I'm trying to export my table from a webapp with struts, tiles, and a remote database connection and whem I try to export the displaytag generated table to any format I'm getting an empty file.
I'd try all possible solutions I found in this forum (filters, put the table out of the tiles, ...) and still doesn't work.

Pd. My webserver is weblogic 9

Thanks in advance!

Marcos.