Published Friday, 23 October 2009
It also launched a leaflet campaign attacking David Cameron's plans to fight for every Northern Ireland seat.
The DUP said splits in the unionist vote helped Sinn Fein take the Fermanagh-South Tyrone seat and saw the nationalist SDLP take the South Belfast seat.
The DUP is asking for the Ulster Unionists to agree a single candidate in each constituency to ensure a unionist victory.
Conservative leader Mr Cameron has said he will stick to his plan to stand UUP/Conservative joint candidates in every constituency and avoid any pan-unionist pact to freeze out nationalists.
In March, leading Northern Ireland Conservative Jeffrey Peel, who helped set up the pact with the UUP, walked away from the scheme.
He claimed the Ulster Unionists were using the tie-in with the Tories to raise cash and fight off a financial crisis.
Mr Peel also claimed too many Ulster Unionists were wedded to the party's past and unwilling to embrace a new Conservative political platform that could reach outside its traditional unionist support.
The DUP leaflets released today picture party leader Peter Robinson beside the words: "The DUP is committed to having a unionist MP for Fermanagh and South Tyrone."
Next to an image of Mr Cameron, it adds: "Sadly, others are not."
The DUP's Arlene Foster said: "In 2005, we offered the UUP a choice of seats - they would pick one and we will contest the other. Unfortunately, Trimble and Empey rejected that offer and the result was that South Belfast and Fermanagh and South Tyrone were lost to anti-unionist candidates.
"Today, we renew our offer to the UUP. We will give them a clear run in one constituency of their choosing."