Clearing fields from a form...

Hi Im trying to clear the fields on my form which I used a query to design
this form. I took 3 of my tables in put in a query to join them together has
one. The thing Im trying to do is clear all the fields, but Im getting back
some error. I tried Access own wizard clear function…which was…..

DoCmd.DoMenuItem acFormBar, acRecordsMenu, acSaveRecord, , acMenuVer70

But I got this error in return….

The command or action 'SaveRecord' isn't available now.

I tried to write the code to clear each fields to this…..

Me.LastName.Value = Null or Me.LastName.Value = “”

But I got this error in return….

This recordset is not updateable


So can anyone help me out in trying to clear a form and let me know what Im
doing wrong?

Thank you,