Not enough space on temporaly disk

(sorry for my bad english :-)

I use again for an old website ASP and a connection to Access database.

For some reaseons, when I think this website get to many connexions I have a message that look like this :

"Not enough space on temporaly disck"

end the error link in the code off my page wher theris is the data conexon :

Set Conn = Server.CreateObject("ADODB.Connection")
connstring = "DRIVER={Microsoft Access Driver (*.mdb)}; DBQ=" & mapPathFpdb &"/mybase.mdb"
>>> (here) Conn.Open connstring

Is a quota existe in a Pool in IIS for my website ?

Thank all