Uploading logo in se78 with 78 Dpi

HI,

I have replaced old logo in our system which is used in atleast 20 forms and 15 reports  in SE78 which was of 75 dpi .Now after uploading the new logo I am not able to change to 75 dpi .Now the dpi is 100 dpi.Is there any way to change the logo dpi ?

I know this is discussed many times ,but I didnt find a proper answer anywhere .

Regards,

Subeesh Kannottil