"I activated the key, but the remote console is black/slow."
Add the IMM’s IP address to the Java Control Panel Exception Site List to allow the KVM applet to run. ibm imm remote control activation key verified
If you cannot find a physical sticker, you likely need to retrieve the feature key using IBM's methodology. This is the most common "verified" method for administrators. "I activated the key, but the remote console is black/slow