[Typo3] need help with typolink

[Charles Rector]

I just discovered typolink, and have been able to successfully create a 
link like so:

   plugin.tx_ckfortune_pi1 {
     ...
     10.50.field = text2
     10.50.type = TEXT
     10.50.type.typolink.parameter = 15
     ...
   }

However, when I try to use one of the fields to specify the link, all I 
get is the text, and no link:

   plugin.tx_ckfortune_pi1 {
     ...
     10.50.field = text2
     10.50.type = TEXT
     10.50.type.typolink.parameter.field = text2
     ...
   }

The field contains just a page id, which is valid... Why doesn't it work?