A Minnesota high school senior who asked 600 porn stars to prom on Twitter will not be allowed to bring the one who said yes, his school said.

Mike Stone, 18, tweeted to his prospective dates: "i have dinner hotel and ill give u a massage to."

The teenager told ABCNews.com he turned to Twitter after several girls at Tartan High School in Oakdale, Minn., turned him down.

"I didn't expect this to get blown up. It's great. Everyone at my school is supporting me," Stone said.

But school administrators didn't think so. They banned Megan Piper, 19, who is a Los Angeles-based adult entertainer, from attending prom.

Stone, whose mother said he has special needs, didn't tell her about his porn star date at first.

"I was a little upset at first and I feel like I'm on my kids and know what they're up to," Diven Stone said. "But I support him and I don't understand what her profession has to do with anything."

In a statement released to ABC affiliate KSTP, Tartan High School said Piper's attendance "would be prohibited under Tartan's standard prom procedures and would be inconsistent with two school district policies." Those policies prohibit activity that may lead to disruptions.

Piper said she is disappointed the school banned her from being Stone's prom date, especially since she never attended her own high school prom.

"I can make this kid's dream prom experience come true and get a chance to go to prom," she told ABCNews.com. "It was a win for both of us."