minor problem from combobox in datagrid

[jaYPee]

i have downloaded an example of a combobox in datagrid from this site
http://www.syncfusion.com/FAQ/WinFor...c44c.asp#q480q it works
great except that there are some minor problem. this is what i have
discover from this sample.

when i go to the new row in datagrid with this combobox bound and
click the combobox sometimes there is a default value from the value
of that combobox and when u click some value it is not changing right
after u click the combobox.

is anybody has the same problem i have? pls let me know if you have a
solution for this problem

thanks in advance