Creating more than 1 FTP sites in IIS 7

Hello,

I have installed FTP 7.5 in IIS 7 and have setup a FTP site.
Everything worked fine, I could read/upload/modify the files using FTP client Filezilla.

Now, I am trying to create another FTP site.
I have created a second FTP site pointing to a different folder in web server, then I tried to connect to the second FTP site using FTP client but I couldn't. I knew I am not allowed to use the same port for the second FTP site, so I typed a new port number for the second FTP site (22, not 21) but still cannot connect to the FTP site.

So, my questions are:
Q1: Is port 22 available for use? Is this port used by another protocol? What port number should I use for the second FTP server?

Q2: What could possibly preventing my FTP client from connecting to the FTP site?

Here are the messages Filezilla displayed while I'm trying to connect to the FTP server:

Status:      Connecting to XXX.22.43.20:22...
Status:      Connection established, waiting for welcome message...
Response:      220 Microsoft FTP Service
Command:      USER XXX
Response:      331 Password required for XXX.
Command:      PASS ******
Response:      230 User logged in.
Command:      OPTS UTF8 ON
Response:      200 OPTS UTF8 command successful - UTF8 encoding now ON.
Status:      Connected
Status:      Retrieving directory listing...
Command:      PWD
Response:      257 "/" is current directory.
Command:      TYPE I
Response:      200 Type set to I.
Command:      PORT 10,1,1,4,19,195
Response:      501 Server cannot accept argument.
Command:      PASV
Response:      227 Entering Passive Mode (184,22,43,20,192,60).
Command:      LIST
Response:      150 Opening BINARY mode data connection.
Error:      Connection timed out
Error:      Failed to retrieve directory listing


Thank you,