Requests Limit in Access

Does anyone know if the amount of requests Access can handle at one time is 10 or not? Since Thurs., our web site has been crashing a lot and we think it might be from the amount of traffic we're getting and Access can't keep up, or that Access is limited to only 10 requests at a time. Is there a way to change this limit?

     We have 3 Access databases we're using with Cold Fusion. We're thinking that all the requests are adding up and Access just can't handle everything at once. Everyone within our company uses 2 of the databases and the 3rd one is our web site. Search engines seem to keep making requests to our web site all day long. When you add up all these requests, it's probably over 10 for sure at a time.

       Has anyone experienced this before? We've been told to switch over to SQL instead of Access. Hopefully this would solve everything and the server wouldn't crash anymore.

When I created my last database called, ECO Register, I remember creating it in Access 2007 and I saved it as .accdb extension, but I could not get connected to it in the Cold Fusion Administrator, so I made it .mdb instead. If our Access databases were the newer version, could that maybe handle more requests at one time? Or do we have to install a newer driver for Access on Cold Fusion to handle more requests? I did see in the Adminstrator page there is a Microsoft Access driver type and a Microsoft Access with Unicode driver type option. What are the differences? I see that we have an SQL driver type in the Administrator page. Do we have to do a lot of set up to make that work? Or do I just connect my Access database to that SQL driver and then update the pages to use SQL?

      If anyone could help me out, that would be great. Thanks.

Andy