The issue like Jeffrey said is an inernet/firewall problem...the graphics/cpu should have nothing to do with it...
Remember that the specs to run POTCO is only 800Mhz with 512mb RAM...the E310 is a 2.8Ghz cpu and is usually loaded with 512Mb DDR2 400 Mhz (PC2 4200U) to start with and it will take a maximum of 2 gigs of memory...the only downside to the E310 is that it runs on an older PCI-E x1 slot...
Is there an actual video card installed or is it the intergrated card? If there's an actual card, did you set the BIOS to have graphics run off the card itself?
You can do minor upgrades to the E310 to make the game run more smoothly for you...but again, your issue is an internet/firewall problem at best...
Good luck and let us know how you make out...
*** Oh and yea, great seeing you again Max...