Sure thing, I'll give you a quick run down on what I am doing / how to replicate.
To start off I am flying via a keyboard and mouse atm. My HUD is also set to english via the avionics language setting in game.
Su-33: with some kind of free fall bomb / cluster bomb (EX: RBK or FAB series). Start position doesn't matter... could be from the runway, ramp hot / cold, a carrier... it works no matter how I start
Before entering air to ground mode make sure you have no mode selected in navigation HUD mode. Keep clicking the number 1 (Not num pad 1) until nothing appears in the bottom left of the HUD. If it says ENR, RTN, or LNDG you need to keep clicking the number 1.
Go to air to ground mode via the number 7 (Not num pad 7). Make sure your have one of the previously mentioned weapons selected.
Use the on HUD "piper" to select a point on the ground, can be an actual target or an empty space. Once the "piper" is on the target hold down the space bar... A diamond should appear on the over our target signifying you are now in CCRP mode.
This is very important, make sure you continue to hold down the space bar or your will loss your target. Well doing so activate Combat Steering mode via Left ALT + 6. Your aircraft should now be flying wings level towards the assigned target.
Continue holding space bar, once at the drop point you will hear the "predrop tone"... the weapon will be released. At this point your aircraft should enter wings level flight ACS mode. It is up to you how to proceed at this point.