How to configure distributed transaction in Oracle Database Gateway for ODBC? (ORA-02047)

I am connecting from Oracle to MS SQL Server through an ODBC connection using Oracle SQL Developer. (How)

I want to query the schema of the MS SQL database using the data dictionary mapping of the Oracle Database Gateway for ODBC.

This works well:

select * from all_tables@katimssql;

But this doesn't:

create table alltables_mssql as 
select * from all_tables@katimssql;

Output:

Error report:
SQL Error: ORA-00604: error occurred at recursive SQL level 1
ORA-02047: cannot join the distributed transaction in progress
ORA-06512: at "SYS.HS$_DDTF_SQLTABLES", line 58
ORA-06512: at line 1

Does anyone know the solution of this?
Thanks in advance,
Kati

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Details:

Oracle Database 11g Express Edition Release 11.2.0.2.0
Microsoft SQL Server 2008 (SP2) - 10.0.4000.0 (X64)
ODBC Driver: SQL Server Native Client 11.0 (32 bit)

initkatimssql.ora:

HS_FDS_CONNECT_INFO=katimssql
HS_FDS_TRACE_LEVEL = ON
HS_TRANSACTION_MODEL = READ_ONLY_AUTOCOMMIT

I tried these, none of them worked, the error message is the same.

HS_FDS_TRACE_LEVEL = off
HS_TRANSACTION_MODEL = SINGLE_SITE
HS_TRANSACTION_MODEL = READ_ONLY_AUTOCOMMIT
HS_TRANSACTION_MODEL = READ_ONLY