There are many zombie models in the server,when used for first time,they cause the mentioned up freezing.The second time,this doesn't happen for the same model.Every model needs to be ready for use at any time,so that's why we will put 2 files that will do this automatic every time at the beggining of a map.
I am giving the answer to everybody how to deal with that:
Download This archive and put it in the \CSS\cstrike\cfg
Check before you do that do you have the same files,before otherwise you will rewrite them if you have any modifications to the options you made.If you don't want that,check your files \CSS\cstrike\cfg and if you have them just add the wroten from the files from the archive and save them.
Have a good game everybody
