Delaware Senate candidate Christine O'Donnell (R) is having trouble getting her new 24-minute ad on the air, according to campaign tweets from Sunday and Monday.

A local station, Channel 28, was expected to air the ad Sunday night at 11:30 p.m. and Monday at 11 a.m.

"Okay... this is NOT our show! Must be a programming mix up. We will get back to you..." O'Donnell tweeted Sunday night after the ad did not appear.

On Monday at 11 a.m., O'Donnell tweeted again.

"This isn't our show either! We are told channel 28 'forgot' to air it...both times... even though we paid for the time slot last week," she said. "Dirty politics again? I'd like to think the County run station really did just 'forget' even though we reminded them this morning."

Campaign manager Matt Moran described the situation as "developing" and said that the campaign is talking with Channel 28.

O'Donnell spokesman Doug Sachtleben later released a statement.

"It’s still unclear as to why the local cable channel failed to air the half-hour long special. Our hope is that this is not another case of the liberal media or political dirty tricks trying to silence Christine’s message to the voters of Delaware," he said.

Representatives from Channel 28 did not immediately return calls for comment.

The ad is also scheduled to air Monday at 3 p.m. and on Tuesday, the campaign said.

Shane D'Aprile contributed to this report.