My Modem cannot connect at 56k
The highest connection speed with 56k modems is 53kbps due to the FCC guidelines. If you are connecting at 53kbps or close to 53kbps, it is more than likely that this is the highest potential speed you will be able to connect with.
If you are not connecting close to 56kbps, you need to ensure that your Internet provider is using the same standard, such as X2, Flex, or V.90. If you are not connecting to the same standard, it is more than likely that you will only be able to connect at a max of 28/36kbps.
If your Internet Service Provider is using the same standard, it is a good possibility that your phone lines may not be compatible or that your phone lines are not being switched properly.