[intex]

I have finally completed my first book in Adobe Indesign. I now have to export it out in pdf form, but am having some difficulty, I hvae set up the output as follows:
Qualty : Press Quality
Compatibilty: Acrobat 5
Compression: (Color/Greyscale) Auto , Do NOT downsample
Marks: None
Bleed and Slugs: None
Output Color Conversion: Convert to Destination, (Preserve Numbers)
Destination: Document RGB : sRGB IEC61966
Profile Inclusion : Don’t Include Profiles

Now when I try to convert to pdf, it says that the Document Transparency Blend Space does not match the Destination Color Space

What does this mean, and if I change the output to NO COLOR CONVERSION, it should work, but uis this the correct way to accomplish this?

Thanks for all the help