Too many clones from your host. Whats wrong? I cant get connected or anything.. i dont know what i have done either.. plz help me!

Clone is two or more connections from the same mask. meaning, if you have three mIRC's open on the same network, you are cloning, and is most likely illegal on the server.

how can i fix it then!?!

Don't connect multiple times.

If you havent knowingly opened more than one mIRC, it could be that your school/work/provider are giving several ppl the same ip, in which case you would need to talk to them. Other possibilities:
-you have a trojan doing it, run a couple good virus scans, including one of the free online ones like housecall at www.trendmicro.com
-someone else within the same ip range has caused a problem and the network has set a wide ban
-not knowing the exact msg, i dont know if your ip is klined, but you would need to talk to the admins at that network to resolve that, check their website