  The model of current-carrying string loop oscillations is tested to explain
the special set of frequencies related to the high-frequency quasiperiodic
oscillations (HF QPOs) observed recently in the low-mass X-ray binary XTE
J1701-407 containing a neutron star. The external geometry of the neutron star
is approximated by the Kerr geometry, introducing errors not exceeding $10~\%$
for slowly rotating massive neutron stars. The frequencies of the radial and
vertical string loop oscillations are then governed by the mass $M$ and
dimensionless spin $a$ of the neutron star, and by the dimensionless parameter
$\omega$ describing combined effects of the string loop tension and its angular
momentum. It is explicitly demonstrated that the string-loop oscillation model
can explain the observed kHz frequencies for the neutron star parameters
restricted to the intervals ${0.2<a<0.4}$ and ${2.1<M/{\rm M}_{\odot}<2.5}$.
However, the stringy parameter $\omega$ cannot be the same for all the three HF
QPO observations in the XTE J1701-407 source; the limits on the acceptable
values of $\omega$ are given in dependence on the spacetime parameters $M$ and
$a$.
