Character encoding problem using Tcl

I use PostgreSQL 7.0.3 on Linux (i386) platform, Tcl 8.3 is installed.

When entering National special characters (e.g. accented german 
characters) by use of psql into a database, all seems to be ok., the special 
characters appear correct on queries (locale seems to work well in this case).

But when using a Tcl-based interface (e.g. pgaccess or home made tcl 
based programs) to insert such characters into a table, they are not correct 
displayed on queries by use of psql - they appear as two 'unreadable' 
characters (they appear correct in queries done by the tcl application).

I tried to add multibyte support to postgresql, but still the same result.
How to solve this problem?

Johann
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