Test for Empty Text

Hi Experts!

Thanks in advance for reading this. For SQL 2K.

There are two fields: description is char(60) and longdescription  as text.

What I want to do is select description only if longdescription is empty or no test in it.

Tried:

select
  description = CASE WHEN (longdescription IS NULL) THEN description
                     ELSE longdescription
                     END

But it just select blank.

Tried:

select
  description = CASE WHEN (longdescription = '') THEN description
                     ELSE longdescription
                     END
from svccode
where codeid = '00007'

But got this error msg:

Server: Msg 306, Level 16, State 1, Line 1
The text, ntext, and image data types cannot be compared or sorted, except when using IS NULL or LIKE operator.


Can you please help?

T I A !