CAN Mask & Filter setting at ---- software level

Hi,

I have enable my can controller to receive all messages & trying to
filtering messages it at software level.
I referred following link by Heikki
http://old.nabble.com/Setting-CAN-MASK---ID-registers-td14881913.html

Suppose i want to receive only ID_1 & ID_2.
But I was not able to get the desired result ID-0x03 is still passing the
software filter


ID_1  =  0x01;       // 0000 0001
ID_2  =  0x33;       // 0011 0011
mask = 0x32;       // 0011 0010
filter =    0x01;       // 0000 0001

if  ----  messageID_Rx  =  0x03

==========  CODE ======================

result = !( ( filter ^ messageID_Rx ) & mask );

if ( result )
{
      // ID accepted
}


====================================

Can someone on list help me to correct this. Or can suggest me where i am
getting wrong ?
Any reply will be appreciable.

Thanks & Regards,

Dinesh