Document Classes ⇒ kapproc | ToC Problems, Undefined control sequence \OT

[blaafarris]

I am using a version of kluwer academic publishers document class kapproc.cls for my thesis. I have some problems with generating the toc when using \O in the author name of included articles.

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\author{My name {\O}andA{\aa}andSomeMore}

I get the error:

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! Undefined control sequence.
l.39 {\noindent \tocauthorfont \relax My name {\OT
                                                   1\O }andA{\unhbox \voidb@...

If I look in the .toc file it says

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{\noindent \tocauthorfont \relax My name {\OT 1\O }andA{\unhbox \voidb@x \bgroup \let \unhbox \voidb@x \setbox \@tempboxa \hbox {a\global \mathchardef \accent@spacefactor \spacefactor }\accent 23 a\egroup \spacefactor \accent@spacefactor }andSomeMore}

If I remove the \O I have no problems with the {\aa}.

I have no idea where to even start looking for a solution to the problem. Any input is appreciated.