Msn signing problems

Hello my computer wont sign in to msn when i ask it to i doesnt come up on the task bar it is on msn hotmail which os smaller and i cannot do anything but talk on this one i prefer the older one and i wondered if you knew how to sort this out. it doesnt work after i sign in on the internet either so i really dont know what to do so my question is : how can i sign into my regular msn?

i would really be glad if you could answer my question as soon as possible as i tend to need to talk with some of my friends who i am not going to see this much thank you for your time reading this.