MSN messenger and wireless router problems

I made a post about having problems with my wireless router and how did I resolve a few months when I was not able to transfer or upload files using messenger or ftp. It has been a happy journey since then. I never felt the need of using MSN messenger until yesterday when I had to be in touch with a client in the US. My favorite messenger has always been Yahoo and I have been using GTalk and Skype lately.

Coming back to the point, I figured out that I was not able to sign in MSN messenger when I am connected using my wireless router. I was able to connect using the wired connection but the MSN messenger wont find a Internet connection on the wireless network. Did lot of research on the Internet but no website could help me. There are many websites which tell you to check if your system date is proper. My system date is proper and I am able to connect wired.

I came back to this post of mine and checked that all changes I had made are still as it is. Tried NAT but that did not work as well. Came back to the old MTU and changed it to 1432. This worked like charm. Now I am able to transfer files and connect to MSN messenger wireless. If any of you experts know why this happens and what exactly is MTU, please email me or post details in comments section. Quiet interested in knowing more about this.

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