Wireless Connection problem?

Hi,

Thanks for clicking on my post.

I did a search but did not find anything.

I have just gotten my MBP, I am having HUGE problems with the wireless connection, its very choppy, in the sense it comes and goes, actually its connected constantly but the data transfer stops almost every couple of seconds or so. For example, if I am watching a video on youtube, it keeps stopping every couple of seconds or so.

I was using a PC on this router wirelessly and no problems.

Also, if I download something on the MBP it takes forever, but PC is 100% ok?

Please help, this is really really frustrating me. I am running 2.5ghz with 2GB RAM with OS 10.5.4

Would greatly appreciate your help and input.

Thanks