We are developing an e-commerce web site in Greek langauge. The problem is when we retrieve and display data in Greek language from database it converts the data into another form

Example:
Data "Προχωρημένη αναζήτηση" from database is displayed as "?p?p???? ?a?a?t???st???"

I am using following meta tag in header:
<meta http-equiv="Content-Type" content="text/html; charset=windows-1253">

Database is MS Access.