Long Table and Caption

[Jonas Weismueller]

Hi,
I am using Lyx 1.4.3. I followed the instructions on
http://wiki.lyx.org/LyX/Tables#toc10
But I get the following error message:

 \caption
             [Longtable]{Longtable with caption}\\%\selectlanguage{british}
I expect to see \noalign only after the \cr of
an alignment. Proceed, and I'll ignore this case.
 
 
 \caption[Longtable]{Longtable with caption}
                                                \\%\selectlanguage{british}
I expect to see \omit only after tab marks or the \cr of
an alignment. Proceed, and I'll ignore this case.


Any hints?
Thanks in advance.

Cheers Jonas