Users dialing in to notes server get 'call timer expired'

[Jono]

hi guys,<br>
we have a notes server running on nt4 (sp5).<br>
when users dial-in (server has a sportster on com1) they get 'call timer expired'. The modem file is the latest from notes.net and when i stop/start the server, it works fine for a few days!<br>
Any ideas?<br>
<br>
thanks in advance<br>
<br>
Jon