If necessary remove the top cover of the machine,(power off) and disconnect the flexible hoses from the dispenser. Check if theyre blocked. The dispenser itself can be separated - generally held together with plastic clips. Clean out any crud or hardened detergent.
Fabric conditioner is taken from the detergent tray by siphon action. Most likely flexible siphon pipe is blocked. Remove machine top, identify the pipe coming from the softener compartment, detach and clean.
Check out my site for info: www.2ndwave.co.uk/manual.html
dan, February 2008