I have strange problem. I levelled up from 23 to 24, and I unlocked 1 armor module and dog tags, I could not simply choose my unlock and after leaving a session I lost my unlock. I just have to be happy with stars next to each weapon and each armor, stealth and power module but I have nothing to unlock. Anyone having the same problem? please advice.

I take it, you've updated the game?

the game is up to date, v.1.4.0.0

That's one of Patch 1.4's features, in order to unlock your unlocks, you have to now also buy the PS3 and Xbox 360 copies of Crysis 2, along with the map packs for each, then put in a promo code on a form held by Waldo from a "Where's Waldo?" book(Provided after completion of Packet A), and proceed to Form B, of Packet C, Page 4, Paragraph 5, Line 3, Word 8, voluntarily sign off your soul to EA Gaming(With special pen provided after completion of Packet G), and put EA Gaming on your Will with entitlement to all belongings and assets.

Then shoot yourself in the head with a gun(Assuming that consumer has unlocked said gun)
provided after completion of Packet B.

Upon failure to complete the following steps EA Gaming will revoke all serial keys and purchases.
....
As well as place you on the top of the FBI's Most Wanted.

That's one of Patch 1.4's features, in order to unlock your unlocks, you have to now also buy the PS3 and Xbox 360 copies of Crysis 2, along with the map packs for each, the put in a promo code on a form held by Waldo from a "Where's Waldo?" book(Provided after completion of Packet A), and proceed to Form B, of Packet C, Page 4, Paragraph 5, Line 3, Word 8, voluntarily sign off your soul to EA Gaming(With special pen provided after completion of Packet G), and put EA Gaming on your Will with entitlement to all belongings and assets.

Then shoot yourself in the head with a gun(Assuming that consumer has unlocked said gun)
provided after completion of Packet B.

Without completion of the following steps EA Gaming will revoke all serial keys and purchases.
....
As well as place you on the top of the FBI's Most Wanted.

that

That's one of Patch 1.4's features, in order to unlock your unlocks, you have to now also buy the PS3 and Xbox 360 copies of Crysis 2, along with the map packs for each, the put in a promo code on a form held by Waldo from a "Where's Waldo?" book(Provided after completion of Packet A), and proceed to Form B, of Packet C, Page 4, Paragraph 5, Line 3, Word 8, voluntarily sign off your soul to EA Gaming(With special pen provided after completion of Packet G), and put EA Gaming on your Will with entitlement to all belongings and assets.

Then shoot yourself in the head with a gun(Assuming that consumer has unlocked said gun)
provided after completion of Packet B.

Without completion of the following steps EA Gaming will revoke all serial keys and purchases.
....
As well as place you on the top of the FBI's Most Wanted.

Hahaha thats awsome omg i almost cried from laughter.