I'm developing a COM+ DLL using Crosstab class (wrapper for _xtab.prg), it works fine in the class, but when I try to use it in the COM+ it's not generating the Crosstab cursor, no error was reported (inclusive using TRY .. CATCH blocks):

FUNCTION CrossTab (tcAlias as String, tcResult as String ) AS Boolean    
  LOCAL llReturn
  llReturn = .T.
  TRY
    SELECT (tcAlias)
    WITH This.oCrossTab
      .cOutFile = tcResult
      .lClosetable = .F.
      .lCursorOnly = .T.
      .nRowField = 2
      .nDataField = 5
      .nColField = 4
 	.lTotalRows = .T.
	.nTotalOption = 0 (0-sum, 1-count, 2-% of total)
	.lDisplayNulls = .T.
	.lBrowseAfter = .F.
	.lShowThem = .F. &&To avoid COM+ error with user interface
	.RunXtab()
   ENDWITH
  CATCH TO oErro
    This.cError = oError.Message
    llReturn = .F.
  ENDTRY
  RETURN llReturn
ENDFUNC

Any ideas, is there some report about the use of this class in COM+ DLL?