Do you get this problem on all servers, or just some? I know that not all the servers are updated yet so that could be the problem. Also is your cd-key 100% legit (not from a friend/keygen etc.)? Because Valve has disabled a lot of the cd-keys that have been floating around, and disabled those that has been caught cheating
From the offcial site, should solve your problems...
"Error! Server verification failed" Problem
This error is caused by the client's inability to communicate with the Secure Master servers to validate the security module being used on secure servers. It can be caused by a few different problems. Here are some things to try:
1) Clients need to communicate with the Secure Master servers (port 27012). First, make sure there isn't a firewall problem.
2) Make sure you do NOT have a file called "woncomm.lst" in your \cstrike folder. If you do, delete it. This file should ONLY reside in your \valve folder.
3) Open the "woncomm.lst" file in your \valve folder (using notepad) and make sure there is an entry that looks like this at the bottom of the file:
"TrackerUI.dll invalid" Problem
This error is harmless and doesn't mean anything. To remove the error from your console, simply follow the same steps outlined for F1 and F2 binding problems (below).
F1 and F2 Binding Problem
To be able to bind your F1 and F2 keys: Go to your Half-Life (or Counter-Strike Retail) directory, open the "valve" folder, open the "cl_dlls" folder, and rename the file "GameUI.dll" to something else (i.e. "GameUI.bak"). You should be able to bind your F1 and F2 keys again.
Ep, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS