Quip tplComments Chunk - &useWrapper property problem!

In MODx AddOns WIKI I read:

"This is the Chunk displayed with the &tplComments property on the Quip.Quip snippet. Only applicable when &useWrapper is set to 1 in the Quip snippet (which it is by default)..."

As I don't want to use the tplComments Chunk I tried to disable it:

[[!Quip?
&thread=`guestbook`
&threaded=`0`
&tplComment=`guestbookentry`
&useCss=`0`
&useWrapper=`0`

]]

But nothing happens. The wrapper template is still displayed.

Am I doing something wrong?
How can I tell Quip not to use this Chunk?

Thanks in advance,
Martin