hey i had the same problem. i did a thread on this but havent updated it in a while. but here are the pics i took. but yeah, its the evap drain. use a air compesser to unclug it. once you do it the water will just pour out. you know the water that leaks underneath cars when then run there AC then turn it off when its parked. well its suppose to do that from the evap drain. yours is clugged, so it has to find somewhere to drain, and its draining into the inside of your car. check out these pics. there from my other post but youll get what im trying to show. sorry if this doesnt help you situation though.
where it was leaking water under the glove box
http://i219.photobucket.com/albums/c...p_01332333.jpg
where i found my evap drain. cant see it though. you got to finger it.
http://i219.photobucket.com/albums/c...tz/p_01339.jpg
this was the compesser i used. 150 psi. the extenision on the end was never going to fit in the tight area. so i bought sum rubber tubeing at the hardware store to feed into the drain.
http://i219.photobucket.com/albums/c...tz/p_01415.jpg
this is how it fead it in
http://i219.photobucket.com/albums/c.../p_01353-1.jpg
and this was the extension to the compesser.
http://i219.photobucket.com/albums/c...tz/p_01354.jpg
once i did it, water just poured out. ever since then about a month ago its been fine.