freeze :(

when i load a track and want to play it ultramixer freezes.
this are the error messages:

[code:23159]Please report the CORE error! (43) Tried to use a feature that requires the software engine. Software engine has either been turned off, or command was executed on a hardware channel which does not support this feature. LoadFile …/…/src/Player.cpp:673
Please report the CORE error! (33) An invalid object handle was used. Load …/…/src/Player.cpp:727
Please report the CORE error! (33) An invalid object handle was used. Load …/…/src/Player.cpp:728
Please report the CORE error! (33) An invalid object handle was used. Load …/…/src/Player.cpp:731
Please report the CORE error! (43) Tried to use a feature that requires the software engine. Software engine has either been turned off, or command was executed on a hardware channel which does not support this feature. Init …/…/src/Monitor.cpp:135
Please report the CORE error! (34) An invalid parameter was passed to this function. Init …/…/src/Monitor.cpp:141
Please report the CORE error! (43) Tried to use a feature that requires the software engine. Software engine has either been turned off, or command was executed on a hardware channel which does not support this feature. Init …/…/src/Monitor.cpp:135
Please report the CORE error! (34) An invalid parameter was passed to this function. Init …/…/src/Monitor.cpp:141
Please report the CORE error! (43) Tried to use a feature that requires the software engine. Software engine has either been turned off, or command was executed on a hardware channel which does not support this feature. Init …/…/src/Monitor.cpp:135
Please report the CORE error! (34) An invalid parameter was passed to this function. Init …/…/src/Monitor.cpp:141
Please report the CORE error! (33) An invalid object handle was used. Load …/…/src/Player.cpp:783
Please report the CORE error! (33) An invalid object handle was used. Load …/…/src/Player.cpp:790
Please report the CORE error! (33) An invalid object handle was used. Load …/…/src/Player.cpp:793
Please report the CORE error! (33) An invalid object handle was used. Load …/…/src/Player.cpp:797
Please report the CORE error! (33) An invalid object handle was used. Load …/…/src/Player.cpp:800[/code:23159]
peyote