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NE555 Timer in circuit not being added to PCB


Hi there newbie here. I'm building an LED flasher circuit with DesignSpark containing 3 resistors - 2x1K, and 1x10K, 2 capacitors - 1x10uF and 1x10nF, and an NE555 Timer IC. when I translate from the .sch file to PCB, everything is there EXCEPT the NE555.

On viewing the report I get the following comment(s) from the report:

Net class "Signal" was not defined, but has been created. Please check the values in the PCB design.
Net class "Ground" was not defined, but has been created. Please check the values in the PCB design.
Could not load component "Timer IC mixed-mode" package "SPICE" into target design.
Could not add "X1" component "Timer IC mixed-mode" package "SPICE" to target design.

What have I done wrong?

Hoping someone can help me.

Ian.

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