AppleShare PC and Windows 3.0 are incompatible and, unfortunately, there is
no known workaround. You may be able to intermittently gain access to
either print or file services with this configuration, but it is not
stable.
On a side note, Farallon has since taken over the LocalTalk PC Card from Apple
and has introduced new software for the card that is compatible with more PC
programs than ever before. This may be a solution. Search under "Farallon"
for the phone number and address of this third party company.