[MiNT] Serial pppd

["Christos Tziotzis" <ctziotzis@gmail.com>]

Hello all,
I' ve got a problem with a serial ppp connection from my falcon to my PC. After I get an established connection to either a windows or a linux box, I can stay online for hours doing IRC or anything that doesn't require large packet transfers. But when I try to browse or ftp after a few seconds I get a system hang (not crash) where nothing responds, not even ctrl alt del. What I've tried to do to correct it:
change speed: no difference
change mru mtu: the same
change scc.xdd: the same
change slip.xif: the same

P.S. I know I need to get an ethernec but it would be nice to have this function till then.
Thank you and regards 
Christos