User Defined Data Types Problem

Hi all,

I defined unsigned_int in my database, which uses unsigned_int_range
rule. The unsigned_int_range rule is defined as follows:
@unsigned_int >=0 and @unsigned_int <=4294967295

(4294967295 = 0xFFFFFFFF)

The storage size is 4 bytes.

One of the tables in the database contains a field that is of type
unsigned_int.

When I try to add a new record into the table (ex: using the Enterprise
Manager), it always fails in the unsigned_int field if I enter a value
greater than 2147483647 (which is 0x7FFFFFFF) all the way to 4294967295
(0xFFFFFFFF). The Enterprise Manager shows the following message:

"The value you entered is not consistent with the data type or
length of the column, or over grid buffer limit."

What is wrong here? The 4-byte storage should be good for any value
from 0 to 4294967295.

Any help is appreciated.

Thanks,
Ken