problems with an Access 2003 database (mdb)

Question

I have created a windows C# application with an Access 2003 mdb database.
I have compiled my application and I have obtined this error: "microsoft.jet.oledb.4.0' provider is not registered on the local machine".
In order to run my applicaton I did this: on my project (in Solution Explorer) clik right, -> Properties -> Build -> Platform target: x86 and my application ran correct.

My questions:
1. Can I create an x64 application with an Access 2003 mdb database ?
2. If yes, how can I do this ?