Query Builder Shows Time Dimension As Two Dimensions?

Good afternoon all,

I have created a cube in Analysis Services with a time dimension named Time. The data is only needed at the month level, so the fields in the table that the dimension is based on are [DTE MM] and [DTE YR]. In Visual Studio 2005 or in SQL Server Mgmt Studio I can browse the dimension and I see that Time has the following attributes: Year and Month both Regular attributes and Time (Key attribute). There is also a hierarchy named [Year - Month] and if I browse that it looks good dril down from All to Year to Month.

However, when I point my Reporting Services Datasource to the cube, and start Query Builder, I see two dimensions, [DTE MM] and [DTE YR] and no Time dimension.

[DTE MM] has attributes [DTE MM].[Month], [DTE MM].[Time], [DTE MM].[Year], [DTE MM].[Year - Month].

[DTE YR] has attributes [DTE YR].[Month], [DTE YR].[Time], [DTE YR].[Year], [DTE YR].[Year - Month]

This is causing me huge problems in my report. I need to use a date range in the query. To do this, I created Query Parameters and refer to Report Parameters that will be passed in. For example, I use ="[DTE YR].[Year - Month].[Year].&[" + Parameters!StartYear.Value + "].&[" + Parameters!StartMonth.Value +"]" (thanks to Simon Philips) as the query parameter for the Start Year Month, but if I use the [DTE YR].[Year - Month] in my SELECT, the data is not sliced in my query results. That is to say that the Year and Month show correctly, according to the date range, but the Measure is equal for each month and is equal to the total for the cube. To slice the data, I have to use [DTE YR].[Year].[Year] and [DTE MM].[Month].[Month] in my select, but then the data is shown for every month, i.e. the date range is ignored.

What am I doing wrong, or is this a quirk of RS that I can work around?

Thanks,
Kathryn