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Michael Douglas has suffered a blow in his public bid for a prison visit with his incarcerated son Cameron after officials at the Drug Policy Alliance (DPA) withdrew their support and shut down an online petition lobbying prison authorities for access.

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The actor recently revealed he and his ex-wife, Diandra Luker, have been banned from seeing their son for two years after he was placed in solitary confinement as punishment for a mishap behind bars in Pennsylvania, where he is serving a nine-year sentence for non-violent drug offenses.

And, after referencing the ban in his Primetime Emmy Awards acceptance speech last month, fans of the actor rushed to support a new petition on Change.org aimed at urging prison bosses to reconsider their decision, but the campaign, which was spearheaded by activists at the DPA, has since been removed from the website.

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According to TMZ, organization bosses had a change of heart about the appeal and decided it was unfair to help an individual case instead of focusing on their main goal of prison reform.

The development comes shortly after editors at the New York Post reported that Luker and Douglas have been appealing to famous friends, like Yoko Ono and designers Calvin Klein and Diane von Furstenberg, to lend their backing to the petition.

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In an email circulated to their powerful pals, they wrote, "We have not seen our son for over a year, and the government is telling us we cannot see our son for TWO YEARS...! Cameron has also been in solitary confinement for TWO YEARS! (For a non violent crime of possession). As parents we are fighting back... PLEASE help us by forwarding this petition after signature, to anyone you know who would like to help the cause."