From that it seems that you are receiving a bless scalar reference. Older versions of threads shared did not allow you to assign bless references (objects) to shared variables for technical reasons.

A recent change by jdhedden alleviated this restriction, but (unless you've already done so) you will need to download the latest versions from CPAN to be able to do this: 

print $threads::VERSION, $threads::shared::VERSION;;
1.67 1.14

[download]
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In reply to Re^3: Shared variables between threads by BrowserUk
in thread Shared variables between threads by Saladino

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