problems before and after using ppp, but not during

[Enigma]

Hi

when i first start my machine i try to access a share from my win95
machine and it can see the machine but when i try to browse it i get
either the 'network is busy' or it tells me it can't find the machine
(even though it's listed in the workgroup), however, while the linux box
is runnig ppp everything is fine, then when i quit it dies again??, can
anyone help me please?

Thanks