Question : joining a cisco 3550 switch to exisiting network

Hi,

I am not a networking guy but am forced into this role due to lack of help. Here is the scenario.
I have a cisco 3550 and 2750 which will have one server a piece and .multiple clients hanging off of it. I need to join these switches to an exisiting network. This is what I have done so far.

The current network does not have a vtp domain set up so I have created a vlan that exists on their root switch. I was told that their vlan had to be on our switch.
I ran switchport mode access:
switchport access vlan #.
So now I see the vlan but still cannot hit their switch. I need to know is there anything else I need to do or did I miss a step. Thanks for your help.

Answer : joining a cisco 3550 switch to exisiting network

1) Connect the two switches using an Ethernet crossover cable
    A trunk should automatically be created.
2) Create the VLAN
    vlan # ! replace # with VLAN number
3) Add the necessary ports to the new VLAN
    interface fastethernet 0/p ! replace "p" with interface number
    switchport access vlan #
4) Exit configuration mode and save config.