How to increase the gain on a preamp


I just received a preamp I bought a week ago, and it sounds fabulous, but the gain is very low specially when playing vinyl, I use an MC cartridge, and the volume knob is all the way up, what can I do remedy this situation?
128x128marcel1728
Details will help here. How much gain does the phono stage have? What is the output of your MC (not clear if it is HOMC or LOMC from your post)? Do you have this gain problem with any non-phono input?

You could also buy an external phono stage that can provide the gain you need if you don't want to cahnge carts or get into SUTs.
Dear Marcell728: You have to contact the manufacturer or use a higher output cartridge.

Regards and enjnoy the music,
R.
Post removed 
How do you guys know so much?
Marcel has not told us bupkes about his system.