Description:
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I implement a web site that invokes a web service (using nusoap.php).
The web service queries a table from an sql server 2000 database and returns a string with the records returned.
The problem is that althou english characters appear correctly into the string, the greek characters are all replayed by '?'.
When used iconv and mb_convert_encoding neither greek nor english characters apper correctly. 
Is the any solution to this problem???

Reproduce code:
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//call web service
$retstr= $client->call('GetRecords',$param);

//returned string
print $retstr;

//using iconv
print iconv("UCS-2","UTF-8",$retstr);

//using mb_convert_encoding
print mb_convert_encoding($retstr,"UTF-8","UCS-2");