Merge Cells - Rows

[aTekTipsUser]

I am creating a report and need to merge two cells using MS Reporting Services 2005. I am using the Table control and have multiple Header Rows and multiple detail rows (to insert the multiple rows, I just right clicked an Selected Insert Row Below). The cells I need to merge are two different header rows. When I select the rows and right click, the Merge Cells menu item is disabled.

How can I merge multiple rows? I would like to know how to do this for header rows and details rows (not sure if this is the same). The reason I would like to merge the cells is so that the text is printed vertically.

Here is an example of how I would like the report to look:
Header (Fld7 is merged among 4 rows to conserve space):
Fld1 Fld4 F Fld08
Fld2 Fld5 L Fld09
Fld3 Fld6 D Fld10
7
Details:
Dat1 Dat4 7 Dat08
Dat2 Dat5 Dat09
Dat3 Dat6 Dat10

Thanks for the help!