database column

hello there,

i used v7beta 2 , then i upgraded to the new verion7.

it worked by adding the missing columns..

But the problems now that when i post a new topic it gives me the following error

Microsoft VBScript runtime error '800a005e'

Invalid use of Null: 'CInt'

/forum/forum_topics.asp, line 377

i found that was because i inserted the column " Moved_ID" in the "tbl topic" table and i made all = 0 ,

so when i make a new posts, the cell won't get any value and the value ==Nul

so how to make the cell auto number??

and will that work later???

All that i need how to make the default of an column equal 0 in the database file Access ,.....Plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz