Odin acting weird? topic

When I try to flash with Odin, nothing happens! This is what is says:

<OSM> All threads completed. (succeed 0 / failed 0)
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> PDA_S5830i_XXLI1.tar.md5 is valid.
<OSM> MODEM_S5830i_DDLI1.tar.md5 is valid.
<OSM> CSC_S5830i_ODDLI1.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<OSM> All threads completed. (succeed 0 / failed 0)

And nothing happens to my Ace! Help!