I have a seemingly simple question, but I am completely stuck:

I have a page with a sqlDataAdapter and a dataset.

After filling the dataset in line 2, I can read from the dataset without
problems.
After altering a value in line3, I can read the NEW value from the dataset
without problems.
But..when updating to disk in line 4, I get this:
"System.FormatException: Input string was not in a correct format."
The error is in line 4.

1:  Sub iWouldLikeToSaveSomeData ()
2:      adapArticles.Fill(DsArticles1)
3:      DsArticles1.Tables("Articles").Rows(2).Item("Article") = "myNewText"
4:      adapArticles.Update(DsArticles1)
5:  End Sub

The field in the Database is a Varchar, and has plenty of room for
"myNewText".

Any ideas as to what to look for. I am completely stumped, as I have another
identical page
that works just fine.. :-(

Thanks,
J.Jespersen