Resolution problem with AvP 2

Good evening.

I play AvP 2 on Windows Seven, with a 1280 x 800 resolution. My problem is that in multiplayer, the text in the chatbox is so small that in can barely read what other player are writting.

Is that a solution - a line in "autoexec.cfg", or something else...- to this problem?

Thanks!

Ah, and sorry for my approximative english.