Why doesn't iceweasel work with iceape

[Bret Busby <bret@busby.net>]

I am running Debian 5.

I have iceweasel installed, and I have iceape installed.

I use iceape because it allows me, on clicking on a mailto link, to open 
an iceape mail composer window.

In trying to configure iceweasel to do the same (iceweasel defaults to 
opening evolution, which I understand to be much the same as microsoft 
outlook), I open the iceweasel Edit -> Preferences -> Applications -> 
mailto option, and it displays the options "Use Gmail", Use Yahoo! 
Mail", "Always ask", and "Use other", which does not give access to 
iceape mail composer.

But, it does not display an option for "Use Iceape Mail Composer", and, 
with iceape mail composer, in viewing the properties, and thus the 
launch command, the iceweaselpreferences options, do not allow for 
entering the command to run iceape mail composer; "iceape -compose".

So, iceweasel recognises proprietary email applications (gmail and yahoo 
mail), but, does not recognise the realted email application; iceape 
mail composer, and, apparently, prohibits the use of iceape mail 
composer, to acion mailto links.

Why doesn't iceweasel work with iceape?

--
Bret Busby
Armadale
West Australia
..............

"So once you do know what the question actually is,
 you'll know what the answer means."
- Deep Thought,
  Chapter 28 of Book 1 of
  "The Hitchhiker's Guide to the Galaxy:
  A Trilogy In Four Parts",
  written by Douglas Adams,
  published by Pan Books, 1992

....................................................