Fadii,
It is best to give as much information about your problem as possible.
If there is an error message, or more information that you can provide, please provide it.
To address an issue that is being discussed in a roundabout way: when APS was used to load a program into some SLC-500, SLC-5/01 and SLC-5/02 controllers, RSLogix 500 could not upload from them. There is a simple DOS-based Upload utility to work around that.
To my knowledge this is not a problem with the SLC-5/03 controllers, unless it exists with the very first OS300 Series A controllers, from about 1988.