No accessible overloaded 'ListItemCollection.Add' can be called without a narrowing conversion

Can anyone explain to me what this error message means?

when i add items in list box, it was work fine for first two records, then it displying error "No accessible overloaded 'ListItemCollection.Add' can be called without a narrowing conversion" what its means....

Can someone point me in the right direction?

Thanks,

A narrowing conversion occurs when you are attempting to put something large into something that is probably too small to hold it. For example, going from Int32 to Int16 should do it.

Have you more of the code, so we can see what you added for the first two records, which worked, and what you finally added which doesn't.