To anyone who can help:
This is what i've done so far:
1) When I connect my LinkStation directly to the Extreme Base Station, everything works fine and transfers nicely.
2) When I connect my LinkStation to a Linksys 4 port Switch which connects to the Extreme Base Station, I can't transfer, download, upload anything to the LinkStation.
I don't know if the switch has any problems since the rest of the devices seem to work fine (internet & slingbox). I have no clue what kind of questions I should be asking right now, so if anyone can help me develop this thread, I would greatly appreciate it.