Problem with Windows 7 to XP networking

[zx22001]

I am new to this site as well as to networking.

The problem I am having is I have a desktop computer using XP and a brand new laptop with Windows 7. I have made it to the point of I have a workgroup that is common between the machines. I can see each other on the network with no problems. The xp machine can access windows 7 but windows 7 cannot access the xp machine. I can ping each other through there ip addresses. I can ping the xp machine from windows 7 using the name of the xp machine but can not ping the windows 7 machine using its computer name.

I have a fear that I may have disabled something on the xp machine by going through the websites on how to speed up my computer. Now I am having trouble back tracking.
I can map drives on xp to windows 7 but not vice versa.

I have also right clicked and shared and selected share with everyone on both machines some files. Only question with this is do they have to be in a specific folder?

Any help is appreciated.

[Capers]

I was also facing similar type of issue and try to do many solutions but none of them worked for me, then i found out a thread which was very helpful for me, hope it works for you too

Cannot Network Windows 7 with Windows XP
Manage wireless networks in Windows 7

[zx22001]

Thank you for your response but everything there I have tried and still having problems. I disabled my firewall and still same problems just can not figure it out any other info will be great.
Thanks,
Brad