Jamie and Jen at the Emmy Awards on Sept. 20, 2009. (Reuters)

Jamie Kennedy and Jennifer Love Hewitt looked like a happy couple at Tao Nightclub’s 4th anniversary party on Oct. 3, but a source close to Jamie tells FOX411 that their relationship is still in trouble from Kennedy's rumored infidelity with his ex-girlfriend, Shannon Funk.

The insider tells FOX411 that Jamie is still in contact with Funk, who is Britney Spears’ former assistant, but that the "Ghost Whisperer" star does not know.

"Jamie is still hung up on Shannon and has been telling her that," says the source. "He also told her he had zero desire to go to the Tao event with [Love Hewiit], but Jen insisted they go together to put rumors to rest. Jamie decided he at least owed her that, so he appeased her and accompanied her to the event even though he’s pretty much checked out of the relationship."

It sounds like Love Hewitt is not totally in the dark, however, according to Jamie's pal.

"Jen knows things have really changed with them, but the public appearance is all part of her damage control plan. Unfortunately for her, it doesn’t seem Jamie is going to stay with Jen ultimately.”

Time will tell...