responses.xls is not working

[bam]

Thanks for your answer but we already found the solution.
We changed the calculation and furthermore put the result of the calculation in the third column of an experimental variable instead of the calculation variable (I think this might have been the main problem before) so that it works perfectly now! But thanks, anyway.

Another question: Is it normal that with responses.xls the change of each display needs a lot of time (1-2 sec.)? We've got a rather long experiment so it's quite disturbing.