Adsense Problem? ad is not visible properly.

My forum address is
http://forum.mobigyaan.com
On the right side of the forum I have placed adsense code. The ad size is 160 x 600 but instead of vertical ad i m seeing a horizontal ad.
Please help me out.

puneet, i too had the exact similar problem. Never figured out why it used to come up like that even when i made the ad on google adsense for a smaller size. Its weird how google adsense acts.

what is the solution.......can any body help me...thnx in advance...plz help me

can nobody help me ....?

I have the same problem. Also ads are visible only in column 3 and not in 1.