HELP REQUIRED

I am getting two error messages: These two messages only started lastnight. How do I fix the problem

1. Microsoft JET Database Engine error '80040e14'

Unknown function name in query expression 'Now()'.

/guestbook/common.asp, line 403

This happens when trying to log in.

2. Microsoft JET Database Engine error '80040e14'
Unknown function name in query expression '(((tblTopic.Forum_ID = 4) OR (tblTopic.Moved_ID = 4)) AND ((tblTopic.Last_entry_date > Now() - 31) OR (tblTopic.Priority > 0))) OR (tblTopic.Priority = 3)'.

/guestbook/forum_topics.asp, line 341

This is when trying to view a topic

Edited by pauli