File sharing between computers connected to a wireless router

Hi,
I have two routers, the first one is not wireless and the second is wireless (Model No. TL-WR740N).
To the first one is connected the TV and the second router. To the the second router (the wireless one) is connected a PC (windows xp) through a UTP cable and 2 laptops (windows 7) via wi-fi. Internet works for all the computers and all of them are pingable. The problem is in file sharing. The first laptop can't access files from PC but it can access files from the second laptop. The second laptop can access files from PC but it can't from the first laptop (the icon of the first laptop is shown in "Network" but it gives an error when trying to access it). The first laptop can access the files from PC only if it's connected to the wireless router through UTP cable, otherwise it won't work.

Please help. I know that the problem is in the first laptop but i don't know where exactly. (i need to access wirelessly the PC files using the first laptop)

Thank you

It may be a sharing and permissions problem.

Have a look at this tutorial: https://www.sevenforums.com/tutorials...rmissions.html

thank you for help but it didn't work. it should be something else.
The sharing and permissions are set correctly.
Any other ideas?

Have you tried placing the files you want to share in the Public folder?

Also, did you turn off password-protected sharing in the Network & Sharing Center?

You might also want to have a look here: http://windows.microsoft.com/en-US/w...tart-to-finish

all this stuff is becoming a bit complicated for me. The password protection sharing is turned off and i don't want to deal with public folder. As i understood it requires additional memory on the hard disk. Besides i'm not sure that it will work. Probably the problem is in Kaspersky Internet Security 2011 or in windows firewall, i'm not sure.
I want to underline the fact that when i connect my laptop to the router trough the UTP cable, the PC is visible and the file sharing works.
But when i connect to it via wi-fi, the PC is not visible.

I"ve always tried to follow the windows 7 tutorials about sharing with xp and I could never ever get it to work.
but 7 can access my xp all day long but not the other way around.
I can't even get it to let my streaming media player to connect all the time. Western digital's support couldn't figure it out either since I did everything they told me to do.

I finely found the problem. After such a long time. Yesterday i opened the settings of Kaspersky internet security from my first laptop and found that my wi-fi network connection is set as a public connection (untrusted). i made it trusted and everything started to work with no problems. So the problem was in antivirus.

Thanks to seavixen32. He gave me the idea about where should a look for the problem.

Thank you Nolanic, I'm pleased you were able find the solution to your problem.

Thanks for the update too.