DB insert Error

Hi,
I'm using ECPG and trying to do follwoing insert in one of the talbes.

insert into raw_email ( id , raw_email ) values ( 1 , :ch);

ch is an array and defined as follows:

EXEC SQL BEGIN DECLARE SECTION;
char ch[MSG_LEN];
EXEC SQL END DECLARE SECTION;

contents of array ch is actually a parsed raw email that i've attached
herewith.

I get the following error when the insert statement is hit:

[2446]: ECPGexecute line 97: Error: ERROR: array value must start with "{"
or dimension information.

No clue what this error is all about. I googled for this error, found a few
results but that didn't help much.

Thanks,
~Jas