Do not remove accented characters

[Sparksoft]

I create the module for registration of EE domains.
The client can create a contact information with symbols(üõäöžš).
In database they remain. But when hostbill calls my module, it replaces these symbols.
for example:  [lastname] Männik => Mannik.

I need symbol "ä"!! must be Männik!!!!

Any comments?

P.S. present "AddDefaultCharset utf-8".

[Sparksoft]

solution is found

[BRJP]

What was the solution?