ORA-20001: Oracle error -2074: ORA-02074: cannot SET NLS in a distributed transaction when call fnd_

Hi, I have this error when I execute fnd_global.apps_initialize:

fnd_global.apps_initialize (v_user_id, v_resp_id, v_appl_id);

ORA-20001: Oracle error -20001: ORA-20001: Oracle error -2074: ORA-02074: cannot SET NLS in a distributed transaction

has been detected in fnd_global.set_nls.set_parameter('NLS_LANGUAGE','AMERICAN').

has been detected in fnd_global.set_nls. ORA-06512: at "APPS.APP_EXCEPTION", line 72

ORA-06512: at "APPS.FND_GLOBAL", line 280

ORA-06512: at "APPS.FND_GLOBAL", line 1584

ORA-06512: at "APPS.FND_GLOBAL", line 2017

ORA-06512: at "APPS.FND_GLOBAL", line 2652

ORA-06512: at "APPS.FND_GLOBAL", line 2804

ORA-06512: at "APPS.FND_GLOBAL", line 2742