Zend certified PHP/Magento developer

Cant log on to Metasploitable 2 into VM ware

I downloaded the zip file of Metasploitabe2 in to the downloads folder, and then un zipped it to my desktop. On vm ware, i clicked to open a virtual machine, navigated to the location where i unzipped it.There was only vmx file there , so i then powered on the VM.
When i tried to put the US name then entered ok, but the password nothing was able to input.
UN and PW msfadmin

Please advice what i need to do to get it working.
Kindly note im am a new student in this field.