How can I change dot by comma in a report?

Hi. I'm working with 6.5.1, full client and webi, but I have not been able to change the numeric format 2.333,00 by 2,333.00. I mean, dot by comma for tens and dot for decimal.

I checked the configuration in bo server and pc client, and the format is correct, but the report show me 2.333,00.

Could you help me?

Thank in advanced.