if your combo box is drawing from a table and you are using the PK as the bound column but you are looking up the text value of that in your query you'll have to do one of two things.
1. in your 'search' combo boxes eliminate the bound column and make the text value the bound column
EDIT: in other words your combo44 ROW SOURCE should be
Code:
SELECT [انواع الارساليات].الانواع FROM [انواع الارساليات];
OR
2. create a field on your form that is invisible, make the control source of that field
=combo44.column(1)
this is assuming that your bound column is 1 and it's the PK of the table with the values in it and the 2nd column actually contains the string you want to search for.