how to load IOS onto 2950

i was just handed a 2950 and told to upgrade its IOS to the latest image we have. The image is c2950-i6q4l2-mz.121-22.EA10a.bin. i followed this directions http://www.cisco.com/en/US/products/hw/switches/ps628/products_configuration_example09186a0080169627.shtml and now i have deleted the previously installed image and can not load the new image onto the 2950.  My current prompt includes these options:

switch: ?
           ? -- Present list of available commands
        boot -- Load and boot an executable image
         cat -- Concatenate (type) file(s)
        copy -- Copy a file
      delete -- Delete file(s)
         dir -- List files in directories
  flash_init -- Initialize flash filesystem(s)
      format -- Format a filesystem
        fsck -- Check filesystem consistency
        help -- Present list of available commands
 load_helper -- Load and initialize a helper image
      memory -- Present memory heap utilization information
       mkdir -- Create dir(s)
        more -- Concatenate (display) file(s)
      rename -- Rename a file
       reset -- Reset the system
       rmdir -- Delete empty dir(s)
         set -- Set or display environment variables
   set_param -- Set system parameters in flash
        trap -- Cause a software breakpoint to occur
        type -- Concatenate (type) file(s)
 unset -- Unset one or more environment variables
     version -- Display boot loader version

using where i currently am, how can i load a new image onto this 2950? i have tftpd32 running and just used it earlier today to load images onto tasman devices so i know that the issues is on the 2950. thanks in advance.