Dialog for properties in dataprvider is empty,

when I want to alter it for the second time.
I choose a dataprovider, klick on properties and alter something. ItM-4s OK.
Then I choose another dataprovider, click on properties again and an empty dialog is showing. I have to restart developer to alter another dataproviders property.

Version R2 2.0 rc5-build 264
Java version 1.4.2_03-b02 (Windows 2000)

There is an rc6 already… Maybe it is solved in there…