Whoa, slow down...

ok, step by step:
1) You posted your second reply 4 minutes after the first post - in the future, please use the "edit" button at the bottom of your old post. This way you can add text to your post or correct stuff. Double posting is considered impolite. It's your first post, so no problem. But in future posts, please... ok?
2) But now to your problem - in order to make it easier for us to help you, please try to give as accurate information as possible.
- You said "I downloaded a file of podbot". It would be more helpful if you could tell us which version of podbot you downloaded and where you got it from (and when). You could also tell us which time stamp the file has (the date that's displayed when you right-click the dll and select "properties").
- You didn't say which OS you are running (linux or Win), and since some errors could be OS-specific, adding this information always helps.
- You didn't say if you are playing against bots on a listenserver (i.e. you open the server and play at the same computer) or a dedicated server (where you start the server, but join from a different computer)
- You didn't say which version of Counter-Strike you are using and if it is an official one or some hacked / cracked / modified version. We had such a problem here recently, so please specify which CS version you are using (like CS 1.5 or Steam CS 1.6 etc.)
- You said you put the file (which one? "podbot26_mm.dll"?) in "addons map" (I suppose you mean the folder cstrike/addons). PODBot 2.6mm goes into .../cstrike/addons/podbot. All cfg files etc. must be there, as well as the dll.
- You wrote something about writing the dll into the plugins.ini, so I assume you have MetaMod on your PC already? Have you installed it correctly? Did it work before you added PODBot, or did you install it together with PODBot and never checked if it runs correctly or not? And which MetaMod version is it? Are you running any other plugins like AMX, statsme, WC3 etc. ?
Lots of questions, but without more precise descriptions nobody will be able to help you. I've never heard that anyone had the same problem that you mentioned, so it must be something new, and we need more information to find and solve it.