Hi:
I figure, from your use of &_ODSDEST and &_ODSSTYLE that you have code that creates a stored process using the SAS Enterprise Intelligence Platform.
The only kind of results that Excel can "receive" from a stored process are: CSV, HTML and SASReport XML, as explained in this Tech Support Note.
http://support.sas.com/kb/36/031.html
There are some other ODS destinations that you can use in stored processes, but they are mostly HTML based, such as PHTML, CHTML or MSOFFICE2K.
Normally, you cannot use TAGSETS.EXCELXP as an override to _ODSDEST -- excpet in the Information Deliver Portal. The type of XML created by TAGSETS.EXCELXP is not compatible with the Enterprise Intelligence Platform. In SAS 9.1.3, I did test TAGSETS.EXCELXP with the SAS Enterprise Intelligence Platform and the only client applications where you can use TAGSETS.EXCELXP are the Information Delivery Portal and/or SAS Enterprise Guide. (And, if you use TAGSETS.EXCELXP with SAS Enterprise Guide, you cannot open the Spreadsheet Markup Language XML file inside of EG in EG 4.1.)
I suggest you either search previous forum postings for more information about how to make this work in the Information Deliver Portal or work with Tech Support on this issue.
Cynthia