limp mode

my car went in limp mode. so I start checking online for some help because I did not get any codes. after founding a seller(USA transmission parts) I called to tell them about the symptoms. so they told me I need a new TCM (built in the transmission on the valve body) and that it was a common problem. so I bought one and after installing it,the car is accelerating very poor. wont even go in the manumatic position. I am from Surinam (small country in south America) where there are no Infiniti dealers that I could call. so I found you guys when I was browsing on the internet. Please help!