Problem using dbExpress/MySQL/timestamp(2)!!

Hello,

OK i'm trying to get my dbexpress application to handle timestamp(2)
correctly.  now a timestamp of size 2 is just "02" i.e. the year in yy
format.

But what i want to do is return a null date.

Whenever i try and read the contents of
"SQLClientDataSet.Fields[j].AsString" which is the column with the
timestamp(2) in the program crashes and i get this error message:

Project Project1.exe raised exception class EConvertError with message
'Invalid argument to date encode'. Process stopped. Use Step or Run to
continue.

I try and handle it in a try...except but it does not seem to work.

What is the correct way to handle a timestamp(2) in dbexpress?

--
Thanks lots
PT