Single Sign-On - Analysis Office vs BO vs BW

Hello Gurus,

I'm having a problem with the single sign on in Analysis for Microsoft Office Edition.

1. I create a analysis document connected to BW
2. I save the workbook in BO platform (launchpad)
3. I close the analysis office and BO Launchpad.
4. I open again the analysis, but this time I connected via BO
5. When I open this document in BO, the system requireme to me to log on in BW
6. Son we have first log on into BO to open the analysis document, and after log on into BW to be able to refresh the analysis document.

Is there any way to avoid this double log on? first in BO and after to BW. We want only the BO log on an then can open document created in analysis via BW but stored in BO.

Thank you for you help.

Jose